; NOTE: Assertions have been autogenerated by utils/update_test_checks.py

; RUN: opt < %s -S -passes='loop-simplify,loop(loop-flatten),verify' -loop-flatten-widen-iv=true \
; RUN:     -verify-loop-info -verify-dom-info -verify-scev \
; RUN:     -loop-flatten-cost-threshold=6 | \
; RUN:     FileCheck %s --check-prefix=CHECK

; RUN: opt < %s -S -passes='loop-simplify,loop(loop-flatten),verify' -loop-flatten-widen-iv=false \
; RUN:     -verify-loop-info -verify-dom-info -verify-scev | \
; RUN:     FileCheck %s --check-prefix=DONTWIDEN

target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"

; DONTWIDEN-NOT:   %flatten.tripcount
; DONTWIDEN-NOT:   %flatten.trunciv

; Function Attrs: nounwind
define void @foo(ptr %A, i32 %N, i32 %M) {
; CHECK-LABEL: @foo(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP17:%.*]] = icmp sgt i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP17]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK:       for.cond1.preheader.lr.ph:
; CHECK-NEXT:    [[CMP215:%.*]] = icmp sgt i32 [[M:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP215]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond1.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK:       for.cond1.preheader.us:
; CHECK-NEXT:    [[INDVAR1:%.*]] = phi i64 [ [[INDVAR_NEXT2:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    [[MUL_US:%.*]] = mul nsw i32 [[TMP2]], [[M]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    br label [[FOR_BODY4_US:%.*]]
; CHECK:       for.body4.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i32
; CHECK-NEXT:    [[ADD_US:%.*]] = add nsw i32 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[IDXPROM_US:%.*]] = sext i32 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; CHECK-NEXT:    tail call void @f(ptr [[ARRAYIDX_US]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP2_US:%.*]] = icmp slt i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; CHECK:       for.cond1.for.cond.cleanup3_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT2]] = add i64 [[INDVAR1]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp slt i64 [[INDVAR_NEXT2]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @foo(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP17:%.*]] = icmp sgt i32 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP17]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; DONTWIDEN:       for.cond1.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP215:%.*]] = icmp sgt i32 [[M:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP215]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond1.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond1.preheader.us:
; DONTWIDEN-NEXT:    [[I_018_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul nsw i32 [[I_018_US]], [[M]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY4_US:%.*]]
; DONTWIDEN:       for.body4.us:
; DONTWIDEN-NEXT:    [[J_016_US:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY4_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add nsw i32 [[J_016_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[IDXPROM_US:%.*]] = sext i32 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; DONTWIDEN-NEXT:    tail call void @f(ptr [[ARRAYIDX_US]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw nsw i32 [[J_016_US]], 1
; DONTWIDEN-NEXT:    [[CMP2_US:%.*]] = icmp slt i32 [[INC_US]], [[M]]
; DONTWIDEN-NEXT:    br i1 [[CMP2_US]], label [[FOR_BODY4_US]], label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond1.for.cond.cleanup3_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC6_US]] = add nuw nsw i32 [[I_018_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp slt i32 [[INC6_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp17 = icmp sgt i32 %N, 0
  br i1 %cmp17, label %for.cond1.preheader.lr.ph, label %for.cond.cleanup

for.cond1.preheader.lr.ph:
  %cmp215 = icmp sgt i32 %M, 0
  br i1 %cmp215, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup

for.cond1.preheader.us.preheader:
  br label %for.cond1.preheader.us

for.cond1.preheader.us:
  %i.018.us = phi i32 [ %inc6.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
  %mul.us = mul nsw i32 %i.018.us, %M
  br label %for.body4.us

for.body4.us:
  %j.016.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc.us, %for.body4.us ]
  %add.us = add nsw i32 %j.016.us, %mul.us
  %idxprom.us = sext i32 %add.us to i64
  %arrayidx.us = getelementptr inbounds i32, ptr %A, i64 %idxprom.us
  tail call void @f(ptr %arrayidx.us) #2
  %inc.us = add nuw nsw i32 %j.016.us, 1
  %cmp2.us = icmp slt i32 %inc.us, %M
  br i1 %cmp2.us, label %for.body4.us, label %for.cond1.for.cond.cleanup3_crit_edge.us

for.cond1.for.cond.cleanup3_crit_edge.us:
  %inc6.us = add nuw nsw i32 %i.018.us, 1
  %cmp.us = icmp slt i32 %inc6.us, %N
  br i1 %cmp.us, label %for.cond1.preheader.us, label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

; This test case corresponds to this input:
;
;     for (int i = 0; i < N; ++i)
;       for (int j = 0; j < M; ++j)
;         f(A[i*M+j]);
;
; It is very similar to test case @foo above, but the CFG is slightly
; different, making the analysis slightly different.
;
define void @foo2_sext(i32* nocapture readonly %A, i32 %N, i32 %M) {
; CHECK-LABEL: @foo2_sext(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP17:%.*]] = icmp sgt i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP17]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK:       for.cond1.preheader.lr.ph:
; CHECK-NEXT:    [[CMP215:%.*]] = icmp sgt i32 [[M:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP215]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND1_PREHEADER_PREHEADER:%.*]]
; CHECK:       for.cond1.preheader.preheader:
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER:%.*]]
; CHECK:       for.cond1.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[M]] to i64
; CHECK-NEXT:    [[TMP2:%.*]] = sext i32 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP2]]
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK:       for.cond1.preheader.us:
; CHECK-NEXT:    [[INDVAR2:%.*]] = phi i64 [ [[INDVAR_NEXT3:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[I_018_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = mul nsw i64 [[INDVAR2]], [[TMP1]]
; CHECK-NEXT:    [[MUL_US:%.*]] = mul nsw i32 [[I_018_US]], [[M]]
; CHECK-NEXT:    [[TMP4:%.*]] = sext i32 [[MUL_US]] to i64
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR2]] to i32
; CHECK-NEXT:    br label [[FOR_BODY4_US:%.*]]
; CHECK:       for.body4.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ]
; CHECK-NEXT:    [[J_016_US:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP5:%.*]] = add nsw i64 [[INDVAR]], [[TMP3]]
; CHECK-NEXT:    [[TMP6:%.*]] = sext i32 [[J_016_US]] to i64
; CHECK-NEXT:    [[TMP7:%.*]] = add nsw i64 [[TMP6]], [[TMP3]]
; CHECK-NEXT:    [[ADD_US:%.*]] = add nsw i32 [[J_016_US]], [[MUL_US]]
; CHECK-NEXT:    [[IDXPROM_US:%.*]] = sext i32 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDVAR2]]
; CHECK-NEXT:    [[TMP8:%.*]] = load i32, ptr [[ARRAYIDX_US]], align 4
; CHECK-NEXT:    tail call void @g(i32 [[TMP8]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[INC_US:%.*]] = add nuw nsw i32 [[J_016_US]], 1
; CHECK-NEXT:    [[CMP2_US:%.*]] = icmp slt i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; CHECK:       for.cond1.for.cond.cleanup3_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT3]] = add i64 [[INDVAR2]], 1
; CHECK-NEXT:    [[INC6_US]] = add nuw nsw i32 [[I_018_US]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp slt i64 [[INDVAR_NEXT3]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond1.preheader:
; CHECK-NEXT:    [[I_018:%.*]] = phi i32 [ [[INC6:%.*]], [[FOR_COND1_PREHEADER]] ], [ 0, [[FOR_COND1_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    [[INC6]] = add nuw nsw i32 [[I_018]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[INC6]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_COND1_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT19:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup.loopexit19:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @foo2_sext(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP17:%.*]] = icmp sgt i32 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP17]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; DONTWIDEN:       for.cond1.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP215:%.*]] = icmp sgt i32 [[M:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP215]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND1_PREHEADER_PREHEADER:%.*]]
; DONTWIDEN:       for.cond1.preheader.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER:%.*]]
; DONTWIDEN:       for.cond1.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond1.preheader.us:
; DONTWIDEN-NEXT:    [[I_018_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul nsw i32 [[I_018_US]], [[M]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY4_US:%.*]]
; DONTWIDEN:       for.body4.us:
; DONTWIDEN-NEXT:    [[J_016_US:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY4_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add nsw i32 [[J_016_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[IDXPROM_US:%.*]] = sext i32 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; DONTWIDEN-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX_US]], align 4
; DONTWIDEN-NEXT:    tail call void @g(i32 [[TMP0]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw nsw i32 [[J_016_US]], 1
; DONTWIDEN-NEXT:    [[CMP2_US:%.*]] = icmp slt i32 [[INC_US]], [[M]]
; DONTWIDEN-NEXT:    br i1 [[CMP2_US]], label [[FOR_BODY4_US]], label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond1.for.cond.cleanup3_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC6_US]] = add nuw nsw i32 [[I_018_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp slt i32 [[INC6_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond1.preheader:
; DONTWIDEN-NEXT:    [[I_018:%.*]] = phi i32 [ [[INC6:%.*]], [[FOR_COND1_PREHEADER]] ], [ 0, [[FOR_COND1_PREHEADER_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[INC6]] = add nuw nsw i32 [[I_018]], 1
; DONTWIDEN-NEXT:    [[CMP:%.*]] = icmp slt i32 [[INC6]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP]], label [[FOR_COND1_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT19:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup.loopexit19:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp17 = icmp sgt i32 %N, 0
  br i1 %cmp17, label %for.cond1.preheader.lr.ph, label %for.cond.cleanup

for.cond1.preheader.lr.ph:
  %cmp215 = icmp sgt i32 %M, 0
  br i1 %cmp215, label %for.cond1.preheader.us.preheader, label %for.cond1.preheader.preheader

for.cond1.preheader.preheader:
  br label %for.cond1.preheader

for.cond1.preheader.us.preheader:
  br label %for.cond1.preheader.us

for.cond1.preheader.us:
  %i.018.us = phi i32 [ %inc6.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
  %mul.us = mul nsw i32 %i.018.us, %M
  br label %for.body4.us

for.body4.us:
  %j.016.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc.us, %for.body4.us ]
  %add.us = add nsw i32 %j.016.us, %mul.us
  %idxprom.us = sext i32 %add.us to i64
  %arrayidx.us = getelementptr inbounds i32, ptr %A, i64 %idxprom.us
  %0 = load i32, ptr %arrayidx.us, align 4
  tail call void @g(i32 %0)
  %inc.us = add nuw nsw i32 %j.016.us, 1
  %cmp2.us = icmp slt i32 %inc.us, %M
  br i1 %cmp2.us, label %for.body4.us, label %for.cond1.for.cond.cleanup3_crit_edge.us

for.cond1.for.cond.cleanup3_crit_edge.us:
  %inc6.us = add nuw nsw i32 %i.018.us, 1
  %cmp.us = icmp slt i32 %inc6.us, %N
  br i1 %cmp.us, label %for.cond1.preheader.us, label %for.cond.cleanup.loopexit

for.cond1.preheader:
  %i.018 = phi i32 [ %inc6, %for.cond1.preheader ], [ 0, %for.cond1.preheader.preheader ]
  %inc6 = add nuw nsw i32 %i.018, 1
  %cmp = icmp slt i32 %inc6, %N
  br i1 %cmp, label %for.cond1.preheader, label %for.cond.cleanup.loopexit19

for.cond.cleanup.loopexit:
  br label %for.cond.cleanup

for.cond.cleanup.loopexit19:
  br label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

; This test case corresponds to this input:
;
;  void foo2_zext(unsigned *A, ..) {
;     for (unsigned i = 0; i < N; ++i)
;       for (unsigned j = 0; j < M; ++j)
;         f(A[i*M+j]);
;
define void @foo2_zext(i32* nocapture readonly %A, i32 %N, i32 %M) {
; CHECK-LABEL: @foo2_zext(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP17_NOT:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP17_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]]
; CHECK:       for.cond1.preheader.lr.ph:
; CHECK-NEXT:    [[CMP215_NOT:%.*]] = icmp eq i32 [[M:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP215_NOT]], label [[FOR_COND1_PREHEADER_PREHEADER:%.*]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]]
; CHECK:       for.cond1.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[M]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK:       for.cond1.preheader.preheader:
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER:%.*]]
; CHECK:       for.cond1.preheader.us:
; CHECK-NEXT:    [[INDVAR1:%.*]] = phi i64 [ [[INDVAR_NEXT2:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    [[MUL_US:%.*]] = mul i32 [[TMP2]], [[M]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    br label [[FOR_BODY4_US:%.*]]
; CHECK:       for.body4.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i32
; CHECK-NEXT:    [[ADD_US:%.*]] = add i32 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[IDXPROM_US:%.*]] = zext i32 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; CHECK-NEXT:    [[TMP4:%.*]] = load i32, ptr [[ARRAYIDX_US]], align 4
; CHECK-NEXT:    tail call void @g(i32 [[TMP4]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP2_US:%.*]] = icmp ult i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; CHECK:       for.cond1.for.cond.cleanup3_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT2]] = add i64 [[INDVAR1]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp ult i64 [[INDVAR_NEXT2]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT19:%.*]]
; CHECK:       for.cond1.preheader:
; CHECK-NEXT:    [[I_018:%.*]] = phi i32 [ [[INC6:%.*]], [[FOR_COND1_PREHEADER]] ], [ 0, [[FOR_COND1_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    [[INC6]] = add i32 [[I_018]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[INC6]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_COND1_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup.loopexit19:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @foo2_zext(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP17_NOT:%.*]] = icmp eq i32 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP17_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]]
; DONTWIDEN:       for.cond1.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP215_NOT:%.*]] = icmp eq i32 [[M:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP215_NOT]], label [[FOR_COND1_PREHEADER_PREHEADER:%.*]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]]
; DONTWIDEN:       for.cond1.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond1.preheader.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER:%.*]]
; DONTWIDEN:       for.cond1.preheader.us:
; DONTWIDEN-NEXT:    [[I_018_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul i32 [[I_018_US]], [[M]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY4_US:%.*]]
; DONTWIDEN:       for.body4.us:
; DONTWIDEN-NEXT:    [[J_016_US:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY4_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add i32 [[J_016_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[IDXPROM_US:%.*]] = zext i32 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; DONTWIDEN-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX_US]], align 4
; DONTWIDEN-NEXT:    tail call void @g(i32 [[TMP0]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw i32 [[J_016_US]], 1
; DONTWIDEN-NEXT:    [[CMP2_US:%.*]] = icmp ult i32 [[INC_US]], [[M]]
; DONTWIDEN-NEXT:    br i1 [[CMP2_US]], label [[FOR_BODY4_US]], label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond1.for.cond.cleanup3_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC6_US]] = add i32 [[I_018_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp ult i32 [[INC6_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT19:%.*]]
; DONTWIDEN:       for.cond1.preheader:
; DONTWIDEN-NEXT:    [[I_018:%.*]] = phi i32 [ [[INC6:%.*]], [[FOR_COND1_PREHEADER]] ], [ 0, [[FOR_COND1_PREHEADER_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[INC6]] = add i32 [[I_018]], 1
; DONTWIDEN-NEXT:    [[CMP:%.*]] = icmp ult i32 [[INC6]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP]], label [[FOR_COND1_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup.loopexit19:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp17.not = icmp eq i32 %N, 0
  br i1 %cmp17.not, label %for.cond.cleanup, label %for.cond1.preheader.lr.ph

for.cond1.preheader.lr.ph:
  %cmp215.not = icmp eq i32 %M, 0
  br i1 %cmp215.not, label %for.cond1.preheader.preheader, label %for.cond1.preheader.us.preheader

for.cond1.preheader.us.preheader:
  br label %for.cond1.preheader.us

for.cond1.preheader.preheader:
  br label %for.cond1.preheader

for.cond1.preheader.us:
  %i.018.us = phi i32 [ %inc6.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
  %mul.us = mul i32 %i.018.us, %M
  br label %for.body4.us

for.body4.us:
  %j.016.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc.us, %for.body4.us ]
  %add.us = add i32 %j.016.us, %mul.us
  %idxprom.us = zext i32 %add.us to i64
  %arrayidx.us = getelementptr inbounds i32, ptr %A, i64 %idxprom.us
  %0 = load i32, ptr %arrayidx.us, align 4
  tail call void @g(i32 %0)
  %inc.us = add nuw i32 %j.016.us, 1
  %cmp2.us = icmp ult i32 %inc.us, %M
  br i1 %cmp2.us, label %for.body4.us, label %for.cond1.for.cond.cleanup3_crit_edge.us

for.cond1.for.cond.cleanup3_crit_edge.us:
  %inc6.us = add i32 %i.018.us, 1
  %cmp.us = icmp ult i32 %inc6.us, %N
  br i1 %cmp.us, label %for.cond1.preheader.us, label %for.cond.cleanup.loopexit19

for.cond1.preheader:
  %i.018 = phi i32 [ %inc6, %for.cond1.preheader ], [ 0, %for.cond1.preheader.preheader ]
  %inc6 = add i32 %i.018, 1
  %cmp = icmp ult i32 %inc6, %N
  br i1 %cmp, label %for.cond1.preheader, label %for.cond.cleanup.loopexit

for.cond.cleanup.loopexit:
  br label %for.cond.cleanup

for.cond.cleanup.loopexit19:
  br label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

define void @zext(i32 %N, ptr nocapture %A, i16 %val) {
; CHECK-LABEL: @zext(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP20_NOT:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP20_NOT]], label [[FOR_END9:%.*]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]]
; CHECK:       for.cond1.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = zext i32 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK:       for.cond1.preheader.us:
; CHECK-NEXT:    [[INDVAR1:%.*]] = phi i64 [ [[INDVAR_NEXT2:%.*]], [[FOR_COND1_FOR_INC7_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    [[MUL_US:%.*]] = mul i32 [[TMP2]], [[N]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    br label [[FOR_BODY3_US:%.*]]
; CHECK:       for.body3.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i32
; CHECK-NEXT:    [[ADD_US:%.*]] = add i32 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[IDXPROM_US:%.*]] = zext i32 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i16, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; CHECK-NEXT:    [[TMP4:%.*]] = load i16, ptr [[ARRAYIDX_US]], align 2
; CHECK-NEXT:    [[ADD5_US:%.*]] = add i16 [[TMP4]], [[VAL:%.*]]
; CHECK-NEXT:    store i16 [[ADD5_US]], ptr [[ARRAYIDX_US]], align 2
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP2_US:%.*]] = icmp ult i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND1_FOR_INC7_CRIT_EDGE_US]]
; CHECK:       for.cond1.for.inc7_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT2]] = add i64 [[INDVAR1]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp ult i64 [[INDVAR_NEXT2]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_END9_LOOPEXIT:%.*]]
; CHECK:       for.end9.loopexit:
; CHECK-NEXT:    br label [[FOR_END9]]
; CHECK:       for.end9:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @zext(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP20_NOT:%.*]] = icmp eq i32 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP20_NOT]], label [[FOR_END9:%.*]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]]
; DONTWIDEN:       for.cond1.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond1.preheader.us:
; DONTWIDEN-NEXT:    [[I_021_US:%.*]] = phi i32 [ [[INC8_US:%.*]], [[FOR_COND1_FOR_INC7_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY3_US:%.*]]
; DONTWIDEN:       for.body3.us:
; DONTWIDEN-NEXT:    [[J_019_US:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY3_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[IDXPROM_US:%.*]] = zext i32 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i16, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; DONTWIDEN-NEXT:    [[TMP0:%.*]] = load i16, ptr [[ARRAYIDX_US]], align 2
; DONTWIDEN-NEXT:    [[ADD5_US:%.*]] = add i16 [[TMP0]], [[VAL:%.*]]
; DONTWIDEN-NEXT:    store i16 [[ADD5_US]], ptr [[ARRAYIDX_US]], align 2
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw i32 [[J_019_US]], 1
; DONTWIDEN-NEXT:    [[CMP2_US:%.*]] = icmp ult i32 [[INC_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP2_US]], label [[FOR_BODY3_US]], label [[FOR_COND1_FOR_INC7_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond1.for.inc7_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC8_US]] = add i32 [[I_021_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp ult i32 [[INC8_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_END9_LOOPEXIT:%.*]]
; DONTWIDEN:       for.end9.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_END9]]
; DONTWIDEN:       for.end9:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp20.not = icmp eq i32 %N, 0
  br i1 %cmp20.not, label %for.end9, label %for.cond1.preheader.us.preheader

for.cond1.preheader.us.preheader:
  br label %for.cond1.preheader.us

for.cond1.preheader.us:
  %i.021.us = phi i32 [ %inc8.us, %for.cond1.for.inc7_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
  %mul.us = mul i32 %i.021.us, %N
  br label %for.body3.us

for.body3.us:
  %j.019.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc.us, %for.body3.us ]
  %add.us = add i32 %j.019.us, %mul.us
  %idxprom.us = zext i32 %add.us to i64
  %arrayidx.us = getelementptr inbounds i16, ptr %A, i64 %idxprom.us
  %0 = load i16, ptr %arrayidx.us, align 2
  %add5.us = add i16 %0, %val
  store i16 %add5.us, ptr %arrayidx.us, align 2
  %inc.us = add nuw i32 %j.019.us, 1
  %cmp2.us = icmp ult i32 %inc.us, %N
  br i1 %cmp2.us, label %for.body3.us, label %for.cond1.for.inc7_crit_edge.us

for.cond1.for.inc7_crit_edge.us:
  %inc8.us = add i32 %i.021.us, 1
  %cmp.us = icmp ult i32 %inc8.us, %N
  br i1 %cmp.us, label %for.cond1.preheader.us, label %for.end9.loopexit

for.end9.loopexit:
  br label %for.end9

for.end9:
  ret void
}

; This IR corresponds to this input:
;
; void test(char n, char m) {
;   for(char i = 0; i < n; i++)
;     for(char j = 0; j < m; j++) {
;       char x = i*m+j;
;       use_32(x);
;     }
; }
;
define void @test(i8 %n, i8 %m) {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP25_NOT:%.*]] = icmp eq i8 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP25_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND3_PREHEADER_LR_PH:%.*]]
; CHECK:       for.cond3.preheader.lr.ph:
; CHECK-NEXT:    [[CMP623_NOT:%.*]] = icmp eq i8 [[M:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP623_NOT]], label [[FOR_COND3_PREHEADER_PREHEADER:%.*]], label [[FOR_COND3_PREHEADER_US_PREHEADER:%.*]]
; CHECK:       for.cond3.preheader.preheader:
; CHECK-NEXT:    br label [[FOR_COND3_PREHEADER:%.*]]
; CHECK:       for.cond3.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i8 [[M]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND3_PREHEADER_US:%.*]]
; CHECK:       for.cond3.preheader.us:
; CHECK-NEXT:    [[INDVAR2:%.*]] = phi i64 [ [[INDVAR_NEXT3:%.*]], [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND3_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR2]] to i8
; CHECK-NEXT:    [[MUL_US:%.*]] = mul i8 [[TMP2]], [[M]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR2]] to i8
; CHECK-NEXT:    br label [[FOR_BODY9_US:%.*]]
; CHECK:       for.body9.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND3_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i8
; CHECK-NEXT:    [[ADD_US:%.*]] = add i8 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[CONV14_US:%.*]] = zext i8 [[FLATTEN_TRUNCIV]] to i32
; CHECK-NEXT:    [[CALL_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP6_US:%.*]] = icmp ult i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US]]
; CHECK:       for.cond3.for.cond.cleanup8_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT3]] = add i64 [[INDVAR2]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp ult i64 [[INDVAR_NEXT3]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND3_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT1:%.*]]
; CHECK:       for.cond3.preheader:
; CHECK-NEXT:    [[I_026:%.*]] = phi i8 [ [[INC16:%.*]], [[FOR_COND3_PREHEADER]] ], [ 0, [[FOR_COND3_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    [[INC16]] = add i8 [[I_026]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[INC16]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_COND3_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup.loopexit1:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @test(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP25_NOT:%.*]] = icmp eq i8 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP25_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND3_PREHEADER_LR_PH:%.*]]
; DONTWIDEN:       for.cond3.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP623_NOT:%.*]] = icmp eq i8 [[M:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP623_NOT]], label [[FOR_COND3_PREHEADER_PREHEADER:%.*]], label [[FOR_COND3_PREHEADER_US_PREHEADER:%.*]]
; DONTWIDEN:       for.cond3.preheader.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND3_PREHEADER:%.*]]
; DONTWIDEN:       for.cond3.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND3_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond3.preheader.us:
; DONTWIDEN-NEXT:    [[I_026_US:%.*]] = phi i8 [ [[INC16_US:%.*]], [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND3_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul i8 [[I_026_US]], [[M]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY9_US:%.*]]
; DONTWIDEN:       for.body9.us:
; DONTWIDEN-NEXT:    [[J_024_US:%.*]] = phi i8 [ 0, [[FOR_COND3_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY9_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add i8 [[J_024_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[CONV14_US:%.*]] = zext i8 [[ADD_US]] to i32
; DONTWIDEN-NEXT:    [[CALL_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw i8 [[J_024_US]], 1
; DONTWIDEN-NEXT:    [[CMP6_US:%.*]] = icmp ult i8 [[INC_US]], [[M]]
; DONTWIDEN-NEXT:    br i1 [[CMP6_US]], label [[FOR_BODY9_US]], label [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond3.for.cond.cleanup8_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC16_US]] = add i8 [[I_026_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp ult i8 [[INC16_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND3_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT1:%.*]]
; DONTWIDEN:       for.cond3.preheader:
; DONTWIDEN-NEXT:    [[I_026:%.*]] = phi i8 [ [[INC16:%.*]], [[FOR_COND3_PREHEADER]] ], [ 0, [[FOR_COND3_PREHEADER_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[INC16]] = add i8 [[I_026]], 1
; DONTWIDEN-NEXT:    [[CMP:%.*]] = icmp ult i8 [[INC16]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP]], label [[FOR_COND3_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup.loopexit1:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp25.not = icmp eq i8 %n, 0
  br i1 %cmp25.not, label %for.cond.cleanup, label %for.cond3.preheader.lr.ph

for.cond3.preheader.lr.ph:
  %cmp623.not = icmp eq i8 %m, 0
  br i1 %cmp623.not, label %for.cond3.preheader.preheader, label %for.cond3.preheader.us.preheader

for.cond3.preheader.preheader:
  br label %for.cond3.preheader

for.cond3.preheader.us.preheader:
  br label %for.cond3.preheader.us

for.cond3.preheader.us:
  %i.026.us = phi i8 [ %inc16.us, %for.cond3.for.cond.cleanup8_crit_edge.us ], [ 0, %for.cond3.preheader.us.preheader ]
  %mul.us = mul i8 %i.026.us, %m
  br label %for.body9.us

for.body9.us:
  %j.024.us = phi i8 [ 0, %for.cond3.preheader.us ], [ %inc.us, %for.body9.us ]
  %add.us = add i8 %j.024.us, %mul.us
  %conv14.us = zext i8 %add.us to i32
  %call.us = tail call i32 @use_32(i32 %conv14.us) #2
  %inc.us = add nuw i8 %j.024.us, 1
  %cmp6.us = icmp ult i8 %inc.us, %m
  br i1 %cmp6.us, label %for.body9.us, label %for.cond3.for.cond.cleanup8_crit_edge.us

for.cond3.for.cond.cleanup8_crit_edge.us:
  %inc16.us = add i8 %i.026.us, 1
  %cmp.us = icmp ult i8 %inc16.us, %n
  br i1 %cmp.us, label %for.cond3.preheader.us, label %for.cond.cleanup

for.cond3.preheader:
  %i.026 = phi i8 [ %inc16, %for.cond3.preheader ], [ 0, %for.cond3.preheader.preheader ]
  %inc16 = add i8 %i.026, 1
  %cmp = icmp ult i8 %inc16, %n
  br i1 %cmp, label %for.cond3.preheader, label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

; This IR corresponds to this input:
;
; void test3(char n, char m) {
;   for(char i = 0; i < n; i++)
;     for(char j = 0; j < m; j++) {
;       char x = i*m+j;
;       use_32(x);
;       use_16(x);
;       use_32(x);
;       use_16(x);
;       use_64(x);
;     }
; }
;
define void @test3(i8 %n, i8 %m) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP37_NOT:%.*]] = icmp eq i8 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP37_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND3_PREHEADER_LR_PH:%.*]]
; CHECK:       for.cond3.preheader.lr.ph:
; CHECK-NEXT:    [[CMP635_NOT:%.*]] = icmp eq i8 [[M:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP635_NOT]], label [[FOR_COND3_PREHEADER_PREHEADER:%.*]], label [[FOR_COND3_PREHEADER_US_PREHEADER:%.*]]
; CHECK:       for.cond3.preheader.preheader:
; CHECK-NEXT:    br label [[FOR_COND3_PREHEADER:%.*]]
; CHECK:       for.cond3.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i8 [[M]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND3_PREHEADER_US:%.*]]
; CHECK:       for.cond3.preheader.us:
; CHECK-NEXT:    [[INDVAR2:%.*]] = phi i64 [ [[INDVAR_NEXT3:%.*]], [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND3_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR2]] to i8
; CHECK-NEXT:    [[MUL_US:%.*]] = mul i8 [[TMP2]], [[M]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR2]] to i8
; CHECK-NEXT:    br label [[FOR_BODY9_US:%.*]]
; CHECK:       for.body9.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND3_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i8
; CHECK-NEXT:    [[ADD_US:%.*]] = add i8 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[CONV14_US:%.*]] = zext i8 [[FLATTEN_TRUNCIV]] to i32
; CHECK-NEXT:    [[CALL_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; CHECK-NEXT:    [[CONV15_US:%.*]] = zext i8 [[FLATTEN_TRUNCIV]] to i16
; CHECK-NEXT:    [[CALL16_US:%.*]] = tail call i32 @use_16(i16 [[CONV15_US]])
; CHECK-NEXT:    [[CALL18_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; CHECK-NEXT:    [[CALL20_US:%.*]] = tail call i32 @use_16(i16 [[CONV15_US]])
; CHECK-NEXT:    [[CONV21_US:%.*]] = zext i8 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[CALL22_US:%.*]] = tail call i32 @use_64(i64 [[CONV21_US]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP6_US:%.*]] = icmp ult i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US]]
; CHECK:       for.cond3.for.cond.cleanup8_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT3]] = add i64 [[INDVAR2]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp ult i64 [[INDVAR_NEXT3]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND3_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT1:%.*]]
; CHECK:       for.cond3.preheader:
; CHECK-NEXT:    [[I_038:%.*]] = phi i8 [ [[INC24:%.*]], [[FOR_COND3_PREHEADER]] ], [ 0, [[FOR_COND3_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    [[INC24]] = add i8 [[I_038]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i8 [[INC24]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_COND3_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup.loopexit1:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @test3(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP37_NOT:%.*]] = icmp eq i8 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP37_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_COND3_PREHEADER_LR_PH:%.*]]
; DONTWIDEN:       for.cond3.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP635_NOT:%.*]] = icmp eq i8 [[M:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP635_NOT]], label [[FOR_COND3_PREHEADER_PREHEADER:%.*]], label [[FOR_COND3_PREHEADER_US_PREHEADER:%.*]]
; DONTWIDEN:       for.cond3.preheader.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND3_PREHEADER:%.*]]
; DONTWIDEN:       for.cond3.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND3_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond3.preheader.us:
; DONTWIDEN-NEXT:    [[I_038_US:%.*]] = phi i8 [ [[INC24_US:%.*]], [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND3_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul i8 [[I_038_US]], [[M]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY9_US:%.*]]
; DONTWIDEN:       for.body9.us:
; DONTWIDEN-NEXT:    [[J_036_US:%.*]] = phi i8 [ 0, [[FOR_COND3_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY9_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add i8 [[J_036_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[CONV14_US:%.*]] = zext i8 [[ADD_US]] to i32
; DONTWIDEN-NEXT:    [[CALL_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; DONTWIDEN-NEXT:    [[CONV15_US:%.*]] = zext i8 [[ADD_US]] to i16
; DONTWIDEN-NEXT:    [[CALL16_US:%.*]] = tail call i32 @use_16(i16 [[CONV15_US]])
; DONTWIDEN-NEXT:    [[CALL18_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; DONTWIDEN-NEXT:    [[CALL20_US:%.*]] = tail call i32 @use_16(i16 [[CONV15_US]])
; DONTWIDEN-NEXT:    [[CONV21_US:%.*]] = zext i8 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[CALL22_US:%.*]] = tail call i32 @use_64(i64 [[CONV21_US]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw i8 [[J_036_US]], 1
; DONTWIDEN-NEXT:    [[CMP6_US:%.*]] = icmp ult i8 [[INC_US]], [[M]]
; DONTWIDEN-NEXT:    br i1 [[CMP6_US]], label [[FOR_BODY9_US]], label [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond3.for.cond.cleanup8_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC24_US]] = add i8 [[I_038_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp ult i8 [[INC24_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND3_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT1:%.*]]
; DONTWIDEN:       for.cond3.preheader:
; DONTWIDEN-NEXT:    [[I_038:%.*]] = phi i8 [ [[INC24:%.*]], [[FOR_COND3_PREHEADER]] ], [ 0, [[FOR_COND3_PREHEADER_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[INC24]] = add i8 [[I_038]], 1
; DONTWIDEN-NEXT:    [[CMP:%.*]] = icmp ult i8 [[INC24]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP]], label [[FOR_COND3_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup.loopexit1:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp37.not = icmp eq i8 %n, 0
  br i1 %cmp37.not, label %for.cond.cleanup, label %for.cond3.preheader.lr.ph

for.cond3.preheader.lr.ph:
  %cmp635.not = icmp eq i8 %m, 0
  br i1 %cmp635.not, label %for.cond3.preheader.preheader, label %for.cond3.preheader.us.preheader

for.cond3.preheader.preheader:
  br label %for.cond3.preheader

for.cond3.preheader.us.preheader:
  br label %for.cond3.preheader.us

for.cond3.preheader.us:
  %i.038.us = phi i8 [ %inc24.us, %for.cond3.for.cond.cleanup8_crit_edge.us ], [ 0, %for.cond3.preheader.us.preheader ]
  %mul.us = mul i8 %i.038.us, %m
  br label %for.body9.us

for.body9.us:
  %j.036.us = phi i8 [ 0, %for.cond3.preheader.us ], [ %inc.us, %for.body9.us ]
  %add.us = add i8 %j.036.us, %mul.us
  %conv14.us = zext i8 %add.us to i32
  %call.us = tail call i32 @use_32(i32 %conv14.us)
  %conv15.us = zext i8 %add.us to i16
  %call16.us = tail call i32 @use_16(i16 %conv15.us)
  %call18.us = tail call i32 @use_32(i32 %conv14.us)
  %call20.us = tail call i32 @use_16(i16 %conv15.us)
  %conv21.us = zext i8 %add.us to i64
  %call22.us = tail call i32 @use_64(i64 %conv21.us)
  %inc.us = add nuw i8 %j.036.us, 1
  %cmp6.us = icmp ult i8 %inc.us, %m
  br i1 %cmp6.us, label %for.body9.us, label %for.cond3.for.cond.cleanup8_crit_edge.us

for.cond3.for.cond.cleanup8_crit_edge.us:
  %inc24.us = add i8 %i.038.us, 1
  %cmp.us = icmp ult i8 %inc24.us, %n
  br i1 %cmp.us, label %for.cond3.preheader.us, label %for.cond.cleanup

for.cond3.preheader:
  %i.038 = phi i8 [ %inc24, %for.cond3.preheader ], [ 0, %for.cond3.preheader.preheader ]
  %inc24 = add i8 %i.038, 1
  %cmp = icmp ult i8 %inc24, %n
  br i1 %cmp, label %for.cond3.preheader, label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

; This IR corresponds to this input:
;
; void test4(short n, short m) {
;   for(short i = 0; i < n; i++)
;     for(short j = 0; j < m; j++) {
;       short x = i*m+j;
;       use_32(x);
;       use_16(x);
;       use_32(x);
;       use_16(x);
;       use_64(x);
;     }
; }
;
define void @test4(i16 %n, i16 %m) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP38:%.*]] = icmp sgt i16 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP38]], label [[FOR_COND3_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK:       for.cond3.preheader.lr.ph:
; CHECK-NEXT:    [[CMP636:%.*]] = icmp sgt i16 [[M:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP636]], label [[FOR_COND3_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND3_PREHEADER_PREHEADER:%.*]]
; CHECK:       for.cond3.preheader.preheader:
; CHECK-NEXT:    br label [[FOR_COND3_PREHEADER:%.*]]
; CHECK:       for.cond3.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i16 [[M]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = sext i16 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND3_PREHEADER_US:%.*]]
; CHECK:       for.cond3.preheader.us:
; CHECK-NEXT:    [[INDVAR2:%.*]] = phi i64 [ [[INDVAR_NEXT3:%.*]], [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND3_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR2]] to i16
; CHECK-NEXT:    [[MUL_US:%.*]] = mul i16 [[TMP2]], [[M]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR2]] to i16
; CHECK-NEXT:    br label [[FOR_BODY9_US:%.*]]
; CHECK:       for.body9.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND3_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i16
; CHECK-NEXT:    [[ADD_US:%.*]] = add i16 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[CONV14_US:%.*]] = sext i16 [[FLATTEN_TRUNCIV]] to i32
; CHECK-NEXT:    [[CALL_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; CHECK-NEXT:    [[CALL15_US:%.*]] = tail call i32 @use_16(i16 [[FLATTEN_TRUNCIV]])
; CHECK-NEXT:    [[CALL17_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; CHECK-NEXT:    [[CALL18_US:%.*]] = tail call i32 @use_16(i16 [[FLATTEN_TRUNCIV]])
; CHECK-NEXT:    [[CONV19_US:%.*]] = sext i16 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[CALL20_US:%.*]] = tail call i32 @use_64(i64 [[CONV19_US]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP6_US:%.*]] = icmp slt i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US]]
; CHECK:       for.cond3.for.cond.cleanup8_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT3]] = add i64 [[INDVAR2]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp slt i64 [[INDVAR_NEXT3]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND3_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond3.preheader:
; CHECK-NEXT:    [[I_039:%.*]] = phi i16 [ [[INC22:%.*]], [[FOR_COND3_PREHEADER]] ], [ 0, [[FOR_COND3_PREHEADER_PREHEADER]] ]
; CHECK-NEXT:    [[INC22]] = add i16 [[I_039]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i16 [[INC22]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_COND3_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT1:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup.loopexit1:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @test4(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[CMP38:%.*]] = icmp sgt i16 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP38]], label [[FOR_COND3_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; DONTWIDEN:       for.cond3.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP636:%.*]] = icmp sgt i16 [[M:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP636]], label [[FOR_COND3_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND3_PREHEADER_PREHEADER:%.*]]
; DONTWIDEN:       for.cond3.preheader.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND3_PREHEADER:%.*]]
; DONTWIDEN:       for.cond3.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND3_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond3.preheader.us:
; DONTWIDEN-NEXT:    [[I_039_US:%.*]] = phi i16 [ [[INC22_US:%.*]], [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND3_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul i16 [[I_039_US]], [[M]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY9_US:%.*]]
; DONTWIDEN:       for.body9.us:
; DONTWIDEN-NEXT:    [[J_037_US:%.*]] = phi i16 [ 0, [[FOR_COND3_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY9_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add i16 [[J_037_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[CONV14_US:%.*]] = sext i16 [[ADD_US]] to i32
; DONTWIDEN-NEXT:    [[CALL_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; DONTWIDEN-NEXT:    [[CALL15_US:%.*]] = tail call i32 @use_16(i16 [[ADD_US]])
; DONTWIDEN-NEXT:    [[CALL17_US:%.*]] = tail call i32 @use_32(i32 [[CONV14_US]])
; DONTWIDEN-NEXT:    [[CALL18_US:%.*]] = tail call i32 @use_16(i16 [[ADD_US]])
; DONTWIDEN-NEXT:    [[CONV19_US:%.*]] = sext i16 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[CALL20_US:%.*]] = tail call i32 @use_64(i64 [[CONV19_US]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw nsw i16 [[J_037_US]], 1
; DONTWIDEN-NEXT:    [[CMP6_US:%.*]] = icmp slt i16 [[INC_US]], [[M]]
; DONTWIDEN-NEXT:    br i1 [[CMP6_US]], label [[FOR_BODY9_US]], label [[FOR_COND3_FOR_COND_CLEANUP8_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond3.for.cond.cleanup8_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC22_US]] = add i16 [[I_039_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp slt i16 [[INC22_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND3_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond3.preheader:
; DONTWIDEN-NEXT:    [[I_039:%.*]] = phi i16 [ [[INC22:%.*]], [[FOR_COND3_PREHEADER]] ], [ 0, [[FOR_COND3_PREHEADER_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[INC22]] = add i16 [[I_039]], 1
; DONTWIDEN-NEXT:    [[CMP:%.*]] = icmp slt i16 [[INC22]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP]], label [[FOR_COND3_PREHEADER]], label [[FOR_COND_CLEANUP_LOOPEXIT1:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup.loopexit1:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %cmp38 = icmp sgt i16 %n, 0
  br i1 %cmp38, label %for.cond3.preheader.lr.ph, label %for.cond.cleanup

for.cond3.preheader.lr.ph:
  %cmp636 = icmp sgt i16 %m, 0
  br i1 %cmp636, label %for.cond3.preheader.us.preheader, label %for.cond3.preheader.preheader

for.cond3.preheader.preheader:
  br label %for.cond3.preheader

for.cond3.preheader.us.preheader:
  br label %for.cond3.preheader.us

for.cond3.preheader.us:
  %i.039.us = phi i16 [ %inc22.us, %for.cond3.for.cond.cleanup8_crit_edge.us ], [ 0, %for.cond3.preheader.us.preheader ]
  %mul.us = mul i16 %i.039.us, %m
  br label %for.body9.us

for.body9.us:
  %j.037.us = phi i16 [ 0, %for.cond3.preheader.us ], [ %inc.us, %for.body9.us ]
  %add.us = add i16 %j.037.us, %mul.us
  %conv14.us = sext i16 %add.us to i32
  %call.us = tail call i32 @use_32(i32 %conv14.us) #2
  %call15.us = tail call i32 @use_16(i16 %add.us) #2
  %call17.us = tail call i32 @use_32(i32 %conv14.us) #2
  %call18.us = tail call i32 @use_16(i16 %add.us) #2
  %conv19.us = sext i16 %add.us to i64
  %call20.us = tail call i32 @use_64(i64 %conv19.us) #2
  %inc.us = add nuw nsw i16 %j.037.us, 1
  %cmp6.us = icmp slt i16 %inc.us, %m
  br i1 %cmp6.us, label %for.body9.us, label %for.cond3.for.cond.cleanup8_crit_edge.us

for.cond3.for.cond.cleanup8_crit_edge.us:
  %inc22.us = add i16 %i.039.us, 1
  %cmp.us = icmp slt i16 %inc22.us, %n
  br i1 %cmp.us, label %for.cond3.preheader.us, label %for.cond.cleanup

for.cond3.preheader:
  %i.039 = phi i16 [ %inc22, %for.cond3.preheader ], [ 0, %for.cond3.preheader.preheader ]
  %inc22 = add i16 %i.039, 1
  %cmp = icmp slt i16 %inc22, %n
  br i1 %cmp, label %for.cond3.preheader, label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

; Identify trip count when it is constant and the IV has been widened.
define i32 @constTripCount() {
; CHECK-LABEL: @constTripCount(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 20, 20
; CHECK-NEXT:    br label [[I_LOOP:%.*]]
; CHECK:       i.loop:
; CHECK-NEXT:    [[INDVAR1:%.*]] = phi i64 [ [[INDVAR_NEXT2:%.*]], [[J_LOOPDONE:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    br label [[J_LOOP:%.*]]
; CHECK:       j.loop:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[I_LOOP]] ]
; CHECK-NEXT:    call void @payload()
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[J_ATEND:%.*]] = icmp eq i64 [[INDVAR_NEXT]], 20
; CHECK-NEXT:    br label [[J_LOOPDONE]]
; CHECK:       j.loopdone:
; CHECK-NEXT:    [[INDVAR_NEXT2]] = add i64 [[INDVAR1]], 1
; CHECK-NEXT:    [[I_ATEND:%.*]] = icmp eq i64 [[INDVAR_NEXT2]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[I_ATEND]], label [[I_LOOPDONE:%.*]], label [[I_LOOP]]
; CHECK:       i.loopdone:
; CHECK-NEXT:    ret i32 0
;
; DONTWIDEN-LABEL: @constTripCount(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    br label [[I_LOOP:%.*]]
; DONTWIDEN:       i.loop:
; DONTWIDEN-NEXT:    [[I:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[I_INC:%.*]], [[J_LOOPDONE:%.*]] ]
; DONTWIDEN-NEXT:    br label [[J_LOOP:%.*]]
; DONTWIDEN:       j.loop:
; DONTWIDEN-NEXT:    [[J:%.*]] = phi i8 [ 0, [[I_LOOP]] ], [ [[J_INC:%.*]], [[J_LOOP]] ]
; DONTWIDEN-NEXT:    call void @payload()
; DONTWIDEN-NEXT:    [[J_INC]] = add i8 [[J]], 1
; DONTWIDEN-NEXT:    [[J_ATEND:%.*]] = icmp eq i8 [[J_INC]], 20
; DONTWIDEN-NEXT:    br i1 [[J_ATEND]], label [[J_LOOPDONE]], label [[J_LOOP]]
; DONTWIDEN:       j.loopdone:
; DONTWIDEN-NEXT:    [[I_INC]] = add i8 [[I]], 1
; DONTWIDEN-NEXT:    [[I_ATEND:%.*]] = icmp eq i8 [[I_INC]], 20
; DONTWIDEN-NEXT:    br i1 [[I_ATEND]], label [[I_LOOPDONE:%.*]], label [[I_LOOP]]
; DONTWIDEN:       i.loopdone:
; DONTWIDEN-NEXT:    ret i32 0
;
entry:
  br label %i.loop

i.loop:
  %i = phi i8 [ 0, %entry ], [ %i.inc, %j.loopdone ]
  br label %j.loop

j.loop:
  %j = phi i8 [ 0, %i.loop ], [ %j.inc, %j.loop ]
  call void @payload()
  %j.inc = add i8 %j, 1
  %j.atend = icmp eq i8 %j.inc, 20
  br i1 %j.atend, label %j.loopdone, label %j.loop

j.loopdone:
  %i.inc = add i8 %i, 1
  %i.atend = icmp eq i8 %i.inc, 20
  br i1 %i.atend, label %i.loopdone, label %i.loop

i.loopdone:
  ret i32 0
}

; Same as @foo, but M is sext from i16. This used to assert because we thought
; this sext was from widening and try to look through it.
define void @foo_M_sext(ptr %A, i32 %N, i16 %M) {
; CHECK-LABEL: @foo_M_sext(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[M2:%.*]] = sext i16 [[M:%.*]] to i32
; CHECK-NEXT:    [[CMP17:%.*]] = icmp sgt i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP17]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK:       for.cond1.preheader.lr.ph:
; CHECK-NEXT:    [[CMP215:%.*]] = icmp sgt i32 [[M2]], 0
; CHECK-NEXT:    br i1 [[CMP215]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond1.preheader.us.preheader:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[M2]] to i64
; CHECK-NEXT:    [[TMP1:%.*]] = sext i32 [[N]] to i64
; CHECK-NEXT:    [[FLATTEN_TRIPCOUNT:%.*]] = mul i64 [[TMP0]], [[TMP1]]
; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; CHECK:       for.cond1.preheader.us:
; CHECK-NEXT:    [[INDVAR1:%.*]] = phi i64 [ [[INDVAR_NEXT2:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    [[MUL_US:%.*]] = mul nsw i32 [[TMP2]], [[M2]]
; CHECK-NEXT:    [[FLATTEN_TRUNCIV:%.*]] = trunc i64 [[INDVAR1]] to i32
; CHECK-NEXT:    br label [[FOR_BODY4_US:%.*]]
; CHECK:       for.body4.us:
; CHECK-NEXT:    [[INDVAR:%.*]] = phi i64 [ 0, [[FOR_COND1_PREHEADER_US]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[INDVAR]] to i32
; CHECK-NEXT:    [[ADD_US:%.*]] = add nsw i32 [[TMP3]], [[MUL_US]]
; CHECK-NEXT:    [[IDXPROM_US:%.*]] = sext i32 [[FLATTEN_TRUNCIV]] to i64
; CHECK-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; CHECK-NEXT:    tail call void @f(ptr [[ARRAYIDX_US]])
; CHECK-NEXT:    [[INDVAR_NEXT:%.*]] = add i64 [[INDVAR]], 1
; CHECK-NEXT:    [[CMP2_US:%.*]] = icmp slt i64 [[INDVAR_NEXT]], [[TMP0]]
; CHECK-NEXT:    br label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; CHECK:       for.cond1.for.cond.cleanup3_crit_edge.us:
; CHECK-NEXT:    [[INDVAR_NEXT2]] = add i64 [[INDVAR1]], 1
; CHECK-NEXT:    [[CMP_US:%.*]] = icmp slt i64 [[INDVAR_NEXT2]], [[FLATTEN_TRIPCOUNT]]
; CHECK-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; CHECK:       for.cond.cleanup.loopexit:
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
; DONTWIDEN-LABEL: @foo_M_sext(
; DONTWIDEN-NEXT:  entry:
; DONTWIDEN-NEXT:    [[M2:%.*]] = sext i16 [[M:%.*]] to i32
; DONTWIDEN-NEXT:    [[CMP17:%.*]] = icmp sgt i32 [[N:%.*]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP17]], label [[FOR_COND1_PREHEADER_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; DONTWIDEN:       for.cond1.preheader.lr.ph:
; DONTWIDEN-NEXT:    [[CMP215:%.*]] = icmp sgt i32 [[M2]], 0
; DONTWIDEN-NEXT:    br i1 [[CMP215]], label [[FOR_COND1_PREHEADER_US_PREHEADER:%.*]], label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond1.preheader.us.preheader:
; DONTWIDEN-NEXT:    br label [[FOR_COND1_PREHEADER_US:%.*]]
; DONTWIDEN:       for.cond1.preheader.us:
; DONTWIDEN-NEXT:    [[I_018_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US:%.*]] ], [ 0, [[FOR_COND1_PREHEADER_US_PREHEADER]] ]
; DONTWIDEN-NEXT:    [[MUL_US:%.*]] = mul nsw i32 [[I_018_US]], [[M2]]
; DONTWIDEN-NEXT:    br label [[FOR_BODY4_US:%.*]]
; DONTWIDEN:       for.body4.us:
; DONTWIDEN-NEXT:    [[J_016_US:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[FOR_BODY4_US]] ]
; DONTWIDEN-NEXT:    [[ADD_US:%.*]] = add nsw i32 [[J_016_US]], [[MUL_US]]
; DONTWIDEN-NEXT:    [[IDXPROM_US:%.*]] = sext i32 [[ADD_US]] to i64
; DONTWIDEN-NEXT:    [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IDXPROM_US]]
; DONTWIDEN-NEXT:    tail call void @f(ptr [[ARRAYIDX_US]])
; DONTWIDEN-NEXT:    [[INC_US]] = add nuw nsw i32 [[J_016_US]], 1
; DONTWIDEN-NEXT:    [[CMP2_US:%.*]] = icmp slt i32 [[INC_US]], [[M2]]
; DONTWIDEN-NEXT:    br i1 [[CMP2_US]], label [[FOR_BODY4_US]], label [[FOR_COND1_FOR_COND_CLEANUP3_CRIT_EDGE_US]]
; DONTWIDEN:       for.cond1.for.cond.cleanup3_crit_edge.us:
; DONTWIDEN-NEXT:    [[INC6_US]] = add nuw nsw i32 [[I_018_US]], 1
; DONTWIDEN-NEXT:    [[CMP_US:%.*]] = icmp slt i32 [[INC6_US]], [[N]]
; DONTWIDEN-NEXT:    br i1 [[CMP_US]], label [[FOR_COND1_PREHEADER_US]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]]
; DONTWIDEN:       for.cond.cleanup.loopexit:
; DONTWIDEN-NEXT:    br label [[FOR_COND_CLEANUP]]
; DONTWIDEN:       for.cond.cleanup:
; DONTWIDEN-NEXT:    ret void
;
entry:
  %M2 = sext i16 %M to i32
  %cmp17 = icmp sgt i32 %N, 0
  br i1 %cmp17, label %for.cond1.preheader.lr.ph, label %for.cond.cleanup

for.cond1.preheader.lr.ph:
  %cmp215 = icmp sgt i32 %M2, 0
  br i1 %cmp215, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup

for.cond1.preheader.us.preheader:
  br label %for.cond1.preheader.us

for.cond1.preheader.us:
  %i.018.us = phi i32 [ %inc6.us, %for.cond1.for.cond.cleanup3_crit_edge.us ], [ 0, %for.cond1.preheader.us.preheader ]
  %mul.us = mul nsw i32 %i.018.us, %M2
  br label %for.body4.us

for.body4.us:
  %j.016.us = phi i32 [ 0, %for.cond1.preheader.us ], [ %inc.us, %for.body4.us ]
  %add.us = add nsw i32 %j.016.us, %mul.us
  %idxprom.us = sext i32 %add.us to i64
  %arrayidx.us = getelementptr inbounds i32, ptr %A, i64 %idxprom.us
  tail call void @f(ptr %arrayidx.us) #2
  %inc.us = add nuw nsw i32 %j.016.us, 1
  %cmp2.us = icmp slt i32 %inc.us, %M2
  br i1 %cmp2.us, label %for.body4.us, label %for.cond1.for.cond.cleanup3_crit_edge.us

for.cond1.for.cond.cleanup3_crit_edge.us:
  %inc6.us = add nuw nsw i32 %i.018.us, 1
  %cmp.us = icmp slt i32 %inc6.us, %N
  br i1 %cmp.us, label %for.cond1.preheader.us, label %for.cond.cleanup

for.cond.cleanup:
  ret void
}

declare void @payload()
declare dso_local i32 @use_32(i32)
declare dso_local i32 @use_16(i16)
declare dso_local i32 @use_64(i64)
declare dso_local void @g(i32)

declare dso_local void @f(ptr %0) local_unnamed_addr #1
